Pixel Circuit Diode Connection Threshold Voltage Sensing

The patent applies inversion by changing the connection configuration of the driving element from a conventional switch connection to a diode connection. Specifically, the gate electrode and second electrode of the driving element are connected through a capacitor during the sensing phase, creating a diode-connected state that enables accurate threshold voltage sensing even when the threshold voltage is negative. This inverted connection method allows the sensing circuit to accurately measure the threshold voltage by utilizing the capacitor to maintain the gate-source voltage relationship during sensing.

The patent introduces a capacitor as an intermediary element between the gate electrode and second electrode of the driving element. This capacitor serves as a mediator that stores the gate-source voltage during the sensing phase, enabling the threshold voltage to be accurately sensed through the diode connection. The capacitor acts as a temporary energy storage device that maintains the voltage relationship necessary for accurate threshold voltage measurement, particularly when the threshold voltage shifts to negative values.

The patent uses inversion by implementing a diode connection configuration where the gate electrode and second electrode are connected through a capacitor during sensing. This inverted connection approach enables the sensing circuit to accurately measure threshold voltage even when it is negative, thereby enabling compensation for threshold voltage shifts that would otherwise deteriorate image quality. The diode connection transforms the driving element into a configuration that is inherently suitable for accurate threshold voltage sensing and compensation.

The patent applies self-service by using the driving element itself as part of the sensing circuit through the diode connection. The driving element's own gate electrode and second electrode are utilized in the sensing configuration, eliminating the need for separate external sensing circuits. This self-service approach simplifies the overall device complexity while enabling accurate threshold voltage sensing and compensation, as the driving element contributes its own components to the sensing function.

The patent applies merging by combining the sensing circuit and compensation circuit functions into a single integrated diode connection configuration. The gate electrode and second electrode of the driving element are connected through a capacitor, creating a unified circuit structure that performs both sensing and compensation functions. This merging eliminates the need for separate independent sensing and compensation circuits, thereby reducing overall circuit complexity while maintaining high threshold voltage sensing accuracy.

The patent implements multi-functionality by designing the diode connection configuration to serve multiple purposes: it enables accurate threshold voltage sensing, facilitates threshold voltage compensation, and maintains normal driving element operation. The capacitor-connected gate and second electrode configuration universally handles both sensing and compensation tasks, making the circuit versatile and reducing the need for additional specialized components, thus balancing functionality with circuit simplicity.